Yves Congar's impressive theology of tradition is, rather paradoxically, a post-traditional attempt to rediscover, conceptualize, and account for tradition. A critical element of Congar's post-traditional work on tradition is his retrieval of a ‘Thomistic’ theology of history. This article explores the ontology and hermeneutics of Congar's theology of history, focusing in particular on some of the dynamics and internal tensions of Congar's mediation of Thomistic sacra doctrina to distinctively modern theological questions. I first discuss Congar's hermeneutics of reception, with particular attention to the influence of Marie-Dominique Chenu. Second, I sketch the main features of Congar's theology of history, with particular attention paid to how it is informed by his ressourcement reading of Thomas. By way of conclusion, I offer an appraisal of and critical response to Congar's post-traditional hermeneutics and ontology of history